You do not need to align decimal points when multipylng. You multiply the two numbers ignoring the decimal point but ensuring that any trailins 0s are present. The number of digits after the decimal point in the answer is the sum of the number of digits after the decimal points in the two multiplicands.
Multiplying a 4 and 15 will result in 60. You just have to convert both factors into decimals.
Yes you do that is very important when doing a decimal problem.* * * * *It is important for other basic binary operations but NOTmultiplication.
In adding decimals, align the decimal point for an easier computation. Example: 5.16 + 3.002 + 0.4 = ______ 5.16 3.002 0.4 ===== 8.562
If two decimal numbers have x and y digits after the decimal point respectively, then their product has (x + y) digits after the decimal point.
When you multiply decimals first you should take away the decimals and just leave the number. Then multiply the two numbers together and you get a larger number than the two numbers you have. Then you have to count out how many decimals places you orignally had in both of the numbers then you put how every many decimal place in the first two numbers in the answer. Let me show you an example 34.56 x 76.096 Take away the decimals 3456 x 76096 Find the answer to this 262987776 Now go back to your two original numbers and find how many decimals places they each have 34.56 has 2 decimals 76.096 has 3 decimals Since you have 2 and 3 decimals you have to put 5 decimal places in your final answer 2629.87776 this is your answer
why do they move the decimals when multiplying
Fractions and decimals are usually rational numbers. Besides, multiplying rational and irrational numbers is also similar.
There is no difference in the procedure.
adding subtracting multiplying and dividing
No, it is not necessary. But it does help to be tidy.
Please see: Multiplying decimals
It can be very helpful, so the question is inappropriate.